Speaker
Description
The most common of the shape memory alloys are those based on TiNi (titanium nickelide). They have a unique set of properties – high values of recoverable deformation and developed forces, high corrosion resistance, which is why they are often used in many industries and medicine.
Shape-memory alloys have a unique ability to restore shape when heated, and it is known that repeated heat changes through the temperature range of martensitic transformations lead to changes in their functional properties.
The stoichiometric alloy Ti49Ni51 was chosen as the study material. The alloy-has a BCC lattice ordered by type B2 and a phase enriched in nickel Ti2Ni3.
A number of original methods and approaches were used to perform these tasks. To obtain samples with grain sizes less than 100 nm, intensive plastic torsion deformation was used.
The main structural parameters were determined by transmission electron microscopy (TEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dilatometry for the obtained samples. With the help of a potentiostat, the electrochemical behavior of the alloys under study in various structural states were studied, in addition, galvanostatic polarization studies were carried out. Interesting dependences of the parameters of electrochemical corrosion on the structural state of the alloy under study were obtained.
The research was carried out with the support of a grant from the President of the Russian Federation for state support of young Russian scientists - candidates of Science.
| Speaker Country | Russia |
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